Find new and used at these booksellers: Overview Explains race car suspensions theory and design. The book also includes a unique string-based model approach to hands-on visualization of suspension movement. Review By Matt Gartner Competition Car Suspension is a practical look at suspension history, types, theory and design. It provides enough discussion of each of these areas to leave the reader with a comprehensive view of the types, components and characteristics of suspensions. The mathematics in the book are focused on weight transfer and forces and the design of suspension components to deal with these forces.
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With lowered springs, you should opt for low height shocks. A front antiroll bar can still be found secondhand or you can adapt one from a modern car. It comes complete with flexible mounting blocks arm ends and central support. The addition of an anti-roll bar from a Hillman Hunter to the front suspension further. Rear anti-roll bars for Imps can be used but must be very weak or handling will be spoiled. Therefore usually not done. Take off the first three rubbers and dis washers - place bolt with remaining rubber and disc washer into wishbone hanging down from top.
Replace two rubbers and disc washers as previously assembled, the Roll Bar, then the last rubber disc washer and nut. Do this on both sides. The back of the Roll Bar must face the rear of the car. Then lift Bar with rear mounting brackets fitted. Mark and drill floor to suit. Bolt up with reinforcement plates over and under floor.
Derrington Ltd. Derrington instructions supplied by Robin Human, 7 Aug. A how-to on replacing king pins and other bits. If an Imp has negative camber up front, because it is a low-pivot Imp that has been lowered, a cure is to modify the kingpin carriers. Wheel bearings If a wheel can be rocked up and down and side to side, the bearing is suspect. Spin the wheel and listen for excessive noise for further diagnosis. Tracking Incorrect tracking can give rise to all manner of peculiar handling traits as well as excessive and uneven tyre wear.
Imp tracking should not be set parallel. Not enough toe-in will give less straight line stability. Too much will promote unnecessary tyre wear. Pearson , even is the change is minimal. For race use the non-adjustable track rod should be replaced by an adjustable one and the front wheel toe-in set to 0 to 2mm with both track rods set to the same length. The rear suspension ideally should be set to 3mm toe in under no circumstances should toe-out be permited on any rear wheel and 0.
Track rod end wear may show as a slight clonk over bumps as well as wandering. To test a track rod end, simply grasp the track road in one hand, and the drum in the other and see if they move as one.
If not, it needs replacing. Tracking gauge Get your own. Tyre shops know nothing about Imps and are just not interested. A very cheap way of setting the tracking is described by G. Harding Impressions Feb , p.
It involves tape, string and a good eye? Wishbones, rear All Imp rear wishbones are physically interchangeable if they are used with the type of handbrake cable appropriate for the year of the wishbone, rather than the car. Rear off-side wishbones tend to rust far worse than those on the near-side, whatever the reason.
This allows the inner column enough movement to face the rack. Lightly hammer a small chisel between the lugs after removing the pinch bolt to break the nut. The remove the chisel! And from the inside of the car hammer the steering wheel towards you with the palms of both hands on the innermost of the spokes. They come with instructions: let them soften in hot water and they go in no problem. Silicon lubrication helps to fit them. Make sure that all front suspension bushes are to the correct torques.
Those that pass through through Metalastic rubber bushes must only be tightened with the car sitting with its weight on the wheels as in: not jacked up. Worn bushes cause wandering. Steering Steering rack Check the steering rack for wear by ensuring that when you turn the steering wheel, the front wheels move instantly. The main problem is clearance - the distance of the rim of the wheel relative to the dash. Some of the Triumph and Ford ones are quite shallow.
Lowering the steering column Steering column upper bush part no. Felt pad can be fitted in place of the bush. It has a more positive fit and is permanent. It is a little difficult to insert. It will help if it gets first soaked in light oil and if the surface is lightly coated with grease.
Upper steering column bearing - Temporary repair Replacement for the upper steering column bearing Part no. Make it a tight grip, otherwise the felt soon settles and there will be excessive clearance. Example: about 8" for two turns. Use a twisting motion and and press with a large box spanner, to wind it down inside the outer column until just below the top. As the self-adhesive backing was on the outside of the bearing, this effectively holds it in place.
A soaking in engine oil completed the the fitting which took 20 minutes - only the steering wheel needed to be removed. If you drive with a broken bearing, the wheel transmits road shock, and the self-cancelling action for the indicators can be disturbed. Later models with the multipurpose stalk could sustain damage to the return-wings, if used without adequate bearing support.
Competition Car Suspension: A Practical Handbook